Inventor · disambiguated record
David B. Upham
Also filed as: UPHAM DAVID B
4 granted patents·3 pending applications·189 citations·filing 1999–2005
80Inventor score
Top patents by PatentIndex Score
7 records- 0190US6529303B1Optical communications networks utilizing frequency division multiplexingKESTREL SOLUTIONS INC·Filed 1999·Granted Mar 4, 2003·90 cites·58 claims
- 0288US6624766B1Recovery and transmission of return-to-zero formatted data using non-return-to-zero devicesKESTREL SOLUTIONS INC·Filed 2001·Granted Sep 23, 2003·80 cites·11 claims
- 0355USRE41517ERecovery and transmission of return-to-zero formatted data using non-return-to-zero devicesPOSSLEY NICHOLAS·Filed 2005·Granted Aug 17, 2010·2 cites·23 claims
- 0445US2003210909A1Optical communications networks utilizing frequency division multiplexingFiled 2003·Application pending·0 cites
- 0544US6452945B1Electrical add-drop multiplexing for optical communications networks utilizing frequency division multiplexingKESTREL SOLUTIONS INC·Filed 1999·Granted Sep 17, 2002·17 cites·33 claims
- 0636US2002024694A1Control channel for an optical communications system utilizing frequency division multiplexingFiled 2001·Application pending·0 cites
- 0733US2002039211A1Variable rate high-speed input and output in optical communication networksFiled 2001·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when David B. Upham files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →